the30top
Software

Best AI Agent Observability & Evals Tools (2026)

Top AI Agent Observability & Evals software — ranked, with pricing and deployment at a glance.

Updated October 2026
Price
Deployment

Showing 30 products

  1. 1
    A

    AgentOps

    Agent monitoring, replay and evaluation platform.

  2. 2
    Amazon CloudWatch logo

    Amazon CloudWatch

    Contact for pricing

    Amazon Web Services

    Observability of your AWS resources and applications on AWS and on-premises.

    View profile
  3. 3
    View profile
  4. 4
    A

    Arize AI

    Open-source AI observability and evaluation platform.

  5. 5
    Better Stack logo

    Better Stack

    Better Stack is an eBPF-based, AI SRE observability tool that helps you ship high-quality software faster.

  6. 6
    Bindplane logo

    Bindplane

    Bindplane is an OpenTelemetry-native, vendor-agnostic telemetry pipeline that strengthens observability by unifying how logs, metrics, and traces are collect…

  7. 7
    B

    Braintrust

    Contact for pricing

    Braintrust

    Evaluation and observability platform for AI products.

    View profile
  8. 8
    C

    Comet

    Open-source evaluation, testing and monitoring platform for LLM applications.

  9. 9
    Dagster logo

    Dagster

    $10/mo

    Dagster Labs

    Dagster is an open source, cloud-native data orchestrator for the whole development lifecycle, with integrated lineage and observability, a declarative progr…

  10. 10
    D

    Datadog LLM Observability

    Contact for pricing

    Datadog

    LLM observability for tracing, monitoring and evaluating production AI applications.

    View profile
  11. 11
    G

    Galileo

    Contact for pricing

    Galileo

    Evaluation and observability platform for generative AI systems.

    View profile
  12. 12
    Grafana logo

    Grafana

    $25000/mo

    Grafana Labs

    Grafana Labs provides an open and composable observability stack built around Grafana, the leading open source technology for dashboards and visualization.

    View profile
  13. 13
    groundcover logo

    groundcover

    Monitor everything you run in your cloud without compromising on cost, granularity, or scale.

  14. 14
    H

    Helicone

    Open-source observability platform for generative AI applications.

  15. 15
    IBM Instana logo

    IBM

    IBM Instana is an automated observability platform for modern stacks, built specifically for the DevOps space.

  16. 16
    KloudMate logo

    KloudMate

    With millions of developers building applications on AWS Cloud's Serverless infrastructure, a robust observability strategy has become the need of the hour.

  17. 17
    L

    Langfuse

    Open-source LLM engineering platform for traces, evaluations, prompt management and metrics.

  18. 18
    L

    LangSmith

    Contact for pricing

    LangChain

    Platform for tracing, evaluating and monitoring LLM applications and agents.

    View profile
  19. 19
    LogicMonitor logo

    LogicMonitor

    Contact for pricing

    LogicMonitor

    LogicMonitor’s SaaS-based observability and IT operations data collaboration platform helps ITOps, developers, MSPs and business leaders gain visibility into…

    View profile
  20. 20
    Logz.io logo

    Logz.io

    $38/mo

    Logz.io

    Logz.io is the leading cloud observability platform that enables engineers to use the best open source tools in the market without the complexity of operatin…

  21. 21
    Lumigo logo

    Lumigo

    $99/mo

    Lumigo

    Lumigo is revolutionizing cloud-native observability, setting a new benchmark for monitoring and troubleshooting.

  22. 22
    Metaplane logo

    Metaplane

    $1249/mo

    Metaplane

    Metaplane is a data observability platform that helps data teams know when things break, what went wrong, and how to fix it.

    View profile
  23. 23
    Middleware logo

    Middleware

    Middleware is an AI-driven, full-stack cloud observability platform that detects, diagnoses, and automatically fixes issues across your entire system—Kuberne…

  24. 24
    openAudit logo

    openAudit

    €2000/mo

    Ellipsys is a editor of a SaaS data governance software, {openAudit}, implemented in fifteen large companies.

    View profile
  25. 25
    Orq logo

    Orq

    Contact for pricing

    Orq.ai

    Orq.ai is a Generative AI Collaboration platform where engineers, product managers, and non-technical teams build and ship reliable AI products.

    View profile
  26. 26
    ScienceLogic logo

    ScienceLogic

    $25000/mo

    ScienceLogic

    ScienceLogic provides extensive systems management and monitoring functionality for physical and virtual server performance monitoring, diagnostics, and tool…

    View profile
  27. 27
    Splunk Enterprise logo

    Splunk Enterprise

    Contact for pricing

    Splunk

    Get actionable insights with Splunk's powerful dashboards and end-to-end visibility from edge to cloud—powered by Splunk AI.

    View profile
  28. 28
    Sumo Logic logo

    Sumo Logic

    Contact for pricing

    Sumo Logic

    Sumo Logic's next-generation log management and machine data analytics service changes this equation, delivering actionable insights into application and inf…

    View profile
  29. 29
    TeamViewer DEX logo

    TeamViewer DEX

    Contact for pricing

    TeamViewer

    For enterprise IT organizations responsible for supporting distributed workforces and complex endpoint estates who need to reduce digital friction, improve e…

    View profile
  30. 30
    Trackingplan logo

    Trackingplan

    Trackingplan is an automated analytics QA, and monitoring platform that ensures your entire tracking setup—including events, marketing pixels, cookies, UTMs,…

AI observability tools compared

NameOpen sourceTracingEvalsPrompt managementSelf-hostPricing
AgentOpsYesOpen source; tracing; replay; evaluationsNot providedNot providedCloudNot provided
Amazon CloudWatchNot providedNot providedNot providedNot providedCloudNot provided
Arize AXNot providedNot providedNot providedNot providedReview collected by and hosted on G2.com.Not provided
Arize PhoenixYesOpen source; tracing; evaluations; experimentsNot providedNot providedCloud, Self-hostedNot provided
Better StackNot providedNot providedNot providedNot providedCloud, On-PremiseNot provided
BindplaneNot providedNot providedNot providedNot providedCloud, On-PremiseNot provided
BraintrustNot providedEvaluations; tracing; prompt managementNot providedEvaluations; tracing; prompt managementCloudNot provided
Comet OpikYesOpen source; tracing; evaluations; prompt managementNot providedOpen source; tracing; evaluations; prompt managementCloud, Self-hostedNot provided
DagsterNot providedNot providedNot providedNot providedCloud, On-PremiseNot provided
Datadog LLM ObservabilityNot providedTracing; evaluations; production monitoringNot providedNot providedCloudNot provided
GalileoNot providedEvaluations; monitoring; tracingNot providedNot providedCloudNot provided
GrafanaNot providedNot providedNot providedNot providedCloud, On-PremiseNot provided
groundcoverNot providedNot providedNot providedNot providedCloud, On-PremiseNot provided
HeliconeYesOpen source; tracing; cost tracking; prompt managementNot providedOpen source; tracing; cost tracking; prompt managementCloud, Self-hostedNot provided
IBM InstanaNot providedNot providedNot providedNot providedCloud, On-PremiseNot provided
KloudMateNot providedNot providedNot providedNot providedCloud, On-PremiseNot provided
LangfuseYesOpen source; tracing; evaluations; prompt management; self-hostingNot providedOpen source; tracing; evaluations; prompt management; self-hostingCloud, Self-hostedNot provided
LangSmithNot providedTracing; evaluations; datasets; prompt testingNot providedTracing; evaluations; datasets; prompt testingCloudNot provided
LogicMonitorNot providedNot providedNot providedNot providedCloud, On-PremiseNot provided
Logz.ioNot providedNot providedNot providedNot providedCloud, On-PremiseNot provided
LumigoNot providedNot providedNot providedNot providedCloud, On-PremiseNot provided
MetaplaneNot providedNot providedNot providedNot providedCloud, On-PremiseNot provided
MiddlewareNot providedNot providedNot providedNot providedCloud, On-PremiseNot provided
openAuditNot providedNot providedNot providedNot providedCloud, On-PremiseNot provided
OrqNot providedNot providedNot providedNot providedCloud, On-PremiseNot provided
ScienceLogicNot providedNot providedNot providedNot providedCloud, On-PremiseNot provided
Splunk EnterpriseNot providedNot providedNot providedNot providedCloud, On-premiseNot provided
Sumo LogicNot providedNot providedNot providedNot providedCloud, On-PremiseNot provided
TeamViewer DEXNot providedNot providedNot providedNot providedCloud, On-PremiseNot provided
TrackingplanNot providedNot providedNot providedNot providedCloud, On-PremiseNot provided

Observability vs evals: what agents in production need

Observability shows what an AI system did in production: prompts, model calls, tool use, latency, cost, errors and the path an agent took. Evaluations judge whether that behavior was useful, safe and correct against examples, rules or human review. Production teams normally need both. Traces help diagnose an individual failure, while evaluations reveal whether a change improves performance across a representative test set. Prompt management adds version history so results can be tied to the exact instructions used. Start by instrumenting the workflows with the highest business or compliance risk, then build a small evaluation set from real cases. Track cost and latency beside quality, because a more accurate agent may still be impractical if it is too slow or expensive. For sensitive data, confirm retention, redaction, access controls, residency and self-hosting before sending traces to a vendor.

Best open-source AI observability tools

  • Langfuse — open-source tracing, evaluations and prompt management.
  • AgentOps — open-source monitoring and replay for agents.
  • Helicone — open-source observability and cost tracking.
  • Comet Opik — open-source tracing and evaluation.
  • Arize Phoenix — open-source observability, experiments and evals.

How to choose

  • Confirm support for your model and agent frameworks.
  • Compare trace depth, evaluation workflows and production monitoring.
  • Check token, latency and per-user cost reporting.
  • Review redaction, retention and data residency.
  • Decide whether self-hosting is required.
  • Test collaboration and prompt-version workflows.

Frequently asked questions

What is LLM observability?

LLM observability records and analyzes prompts, responses, model calls, tool actions, latency, errors and cost. It helps teams understand why an application behaved a certain way and detect changes in production. Agent observability extends this to multi-step workflows, handoffs and actions taken across external systems.

Which AI observability tools are open source?

The data in this category identifies Langfuse, AgentOps, Helicone, Comet Opik and Arize Phoenix as open-source options. Licensing, hosted features and self-hosting requirements can change, so verify the current repository licence and which enterprise capabilities remain proprietary before choosing a deployment model.

Do I need observability and evals separately?

Not necessarily. Many platforms combine tracing and evaluation, but the jobs remain distinct. Observability explains production behavior; evals measure quality against expected outcomes. A combined tool can simplify operations, while separate specialist products may offer deeper testing or monitoring. Ensure results share stable trace and version identifiers.

How much do AI observability tools cost?

Pricing may be based on traces, events, spans, data volume, seats or retention. Open-source software can reduce licence cost but still requires hosting and maintenance. Estimate production traffic, trace depth and retention, then include evaluation runs and support. Use contact pricing where a vendor does not publish a reliable entry price.